Core: Allow toggling ticketsystem on/off by config-setting (patch by leak)

Closes issue 4744.

--HG--
branch : trunk

sql/updates/10431_world_trinity_string.sql

@@ -0,0 +1,4 @@
+DELETE FROM `trinity_string` WHERE `entry` IN (1134, 1135);
+INSERT INTO `trinity_string` (`entry`, `content_default`) VALUES 
+(1134, 'Sending tickets is allowed.'),
+(1135, 'Sending tickets is not allowed.');